—__ a week does Tom go to the club ? — Once a week.A. How oftenB. How soonC. How many time

问题补充：

—__ a week does Tom go to the club ? — Once a week.

A. How often

B. How soon

C. How many times

D. How long

答案：

A. How often

B. How soon

(答案→)C. How many times

D. How long

解析：根据答语内容Once a week.，可知回答为频率，后文有week，说明用次数，故选答案为C